Noun Definition
prevalence
1.Definition: (epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population
Category: General2.Definition: a superiority in numbers or amount
Related Noun(s):preponderance
Category: General3.Definition: the quality of prevailing generally; being widespread
"He was surprised by the prevalence of optimism about the future"
Category: General